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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5528) Binary partitioner
Date Wed, 25 Mar 2009 22:37:54 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12689260#action_12689260
] 

Chris Douglas commented on HADOOP-5528:
---------------------------------------

* It would make sense for the deprecated partitioner class to extend the partitioner from
mapreduce, per the idiom used in HADOOP-1230
* Code using BinaryPartitioner might be more readable if it had a static method for setting
the left and right indices in the config. There are other examples in lib
* The indexer class hierarchy confuses me. Instead of making the semantics configurable, defining
and describing them in the aforementioned static method would be much easier. I'd also be
a fan of using the python semantics, all the time.

> Binary partitioner
> ------------------
>
>                 Key: HADOOP-5528
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5528
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: mapred
>            Reporter: Klaas Bosteels
>            Assignee: Klaas Bosteels
>         Attachments: HADOOP-5528.patch, HADOOP-5528.patch, HADOOP-5528.patch
>
>
> It would be useful to have a {{BinaryPartitioner}} that partitions {{BinaryComparable}}
keys by hashing a configurable part of the bytes array corresponding to each key.

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